Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Vehicle subsystem or accessory control
Reexamination Certificate
2006-12-20
2010-06-22
Beaulieu, Yonel (Department: 3661)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Vehicle subsystem or accessory control
C180S446000, C701S042000
Reexamination Certificate
active
07742858
ABSTRACT:
An electric power steering apparatus including a steering torque detecting section configured to detect a steering torque applied to an operation member for steering a vehicle, a steering state judging section configured to determine whether forward stroke steering that steers the operating member away from a steering angle midpoint is performed, a motor controlling section configured to control the driving of an electric motor based on the steering torque detected by the steering torque detecting section, and a phase compensating section provided in the motor controlling section for performing phase compensation, such that, when the forward stroke steering is not performed according to the steering state judging section, a gain in a predetermined frequency band in frequency response characteristics of the phase compensation is lower than gains in frequency bands lower and higher than the predetermined frequency band, and is lower than a gain in the predetermined frequency band when the forward stroke steering is performed.
REFERENCES:
patent: 5668722 (1997-09-01), Kaufmann et al.
patent: 6148948 (2000-11-01), Shimizu et al.
patent: 6382345 (2002-05-01), Kada et al.
patent: 2002/0060538 (2002-05-01), Hara et al.
patent: 08-020350 (1996-01-01), None
patent: 2001-253358 (2001-09-01), None
Beaulieu Yonel
JTKET Corporation
Rabin & Berdo P.C.
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